Well I will say this, when I compressed them they were both homed the same distance. Seems it was off 1/2" from one end of the pad to the other. I have suspected a warped rotor for some time. It picked up a vibration at about 50000 and I am at 108000 now. I just never thought that a warped rotor would cause an uneven wear like that. That is why I am here asking.